Once you pick the service, the next step is to create the basic project layout and the packages for the Go port. This should not be too tough, particularly if the current code is well packaged. Keep an eye out for things such as circular imports. At the end, you should have a package structure that describes the main components of the service. This is also a good time to engineer the build harness, including writing the Makefile and architecting the dependency-management prerequisites.